85222784 has 16 divisors (see below), whose sum is σ = 169780020. Its totient is φ = 42611328.

The previous prime is 85222777. The next prime is 85222789. The reversal of 85222784 is 48722258.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (16).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85222789) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 332774 + ... + 333029.

Almost surely, 2^85222784 is an apocalyptic number.

It is an amenable number.

85222784 is a deficient number, since it is larger than the sum of its proper divisors (84557236).

85222784 is an equidigital number, since it uses as much as digits as its factorization.

85222784 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 665817 (or 665805 counting only the distinct ones).

The product of its digits is 71680, while the sum is 38.

The square root of 85222784 is about 9231.6187096305. The cubic root of 85222784 is about 440.0667667276.

The spelling of 85222784 in words is "eighty-five million, two hundred twenty-two thousand, seven hundred eighty-four".